CN1062610C - Cladding material for centrifugal casting roll - Google Patents
Cladding material for centrifugal casting roll Download PDFInfo
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- CN1062610C CN1062610C CN96190447A CN96190447A CN1062610C CN 1062610 C CN1062610 C CN 1062610C CN 96190447 A CN96190447 A CN 96190447A CN 96190447 A CN96190447 A CN 96190447A CN 1062610 C CN1062610 C CN 1062610C
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
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Abstract
A centrifugal cast roll shell material composed of a granular MC carbide, graphite and C: 2.5 to 4.7%, Si: 0.8 to 3.2%, Mn: 0.1 to 2.0%, Cr: 0.4 to 1.9%, Mo: 0.6 to 5%, V: 3.0 to 10.0% and Nb: 0.6 to 7.0%, satisfying the following formulae (1), (2), (3) and (4):2.0+0.715 V+0.10 Nb<=C (%)(1)1.1<=Mo/Cr(2)Nb/V<=0.8(3)0.2<=Nb/V(4),the remainder being Fe and inevitable impurities, wherein the pouring temperature is 1,400 DEG C or higher.
Description
﹠amp; #60 Fa Minglingyu ﹠amp; #62
The present invention relates to have wear resistance, the characteristic of crack resistance, low-friction coefficient, even take the rotary casting operation, can not cause segregation yet, have the outer material of roll of good anti-crawling and anti-surface irregularity simultaneously.
﹠amp; #60 Bei Jingjishu ﹠amp; #62
In the past with regard to roll is used material, all be to continue to use rich chromium cast iron, fiber crops mouthful close grain nickelalloy cast iron, A Damaite (nickel chromium triangle is wear-resisting) cast iron etc. always, in order further to improve wear resistance, be roll material so just adopt rapid steel, and then develop roll afterwards with this material.
For example open flat 4-365836 number the Japanese patent gazette spy, announcement is then arranged to contain C:1.5～3.5%, below the Si:1.5%, below the Mn:1.2%, Cr:5.5～12.0%, Mo:2.0～8.0%, V:3.0～10.0%, the composition of Nb:0.6～7.0%, and to satisfy following formula (1), (2) that is:
V+1.8Nb≤7.5C-6.0(％) ……(1)
0.2≤Nb/V≤0.8 ... (2) condition, and remainder is the outer material of roll that Fe and unavoidable impurities are made, in this case, even employing rotary casting, outer inner, can not cause composition, microstructure segregation and have wear resistance concurrently and the rolling roller cladding material of using of crack resistance.
Moreover, open flat 6-256888 number the Japanese patent gazette spy, also disclosed conduct to contain C:1.8～3.6%, Si:1.0～3.5%, Mn:0.1～2.0%, Cr:2.0～10.0%, Mo:0.1～10.0%, W:0.1～10%, V, Nb: one or both add up to 1.5～10%, and remainder to come down to Fe be that the rapid steel that contains the graphite composition of feature is a cast iron materials, this is a kind of low-friction coefficient, is difficult for causing that the rapid steel of be full of cracks progress is a cast iron materials again.
Moreover, open flat 6-335712 communique Japan special permission communique spy, also have to disclose and contain C:2.0～4.0%, Si:0.5～4.0%, Mn:0.1～1.5%, Ni:2.0～6.0%, Cr:1.0～7.0% outside the element of V:2.0～8.0% one-tenth branch, also contains Mo:0.3～4.0%, W:0.3～4.0%, Co:1.0～10.0%, Nb:1.0～10.0%, Ti:0.01～2.0%, B:0.02～0.2%, more than one the hot rolling roller of wear-resisting sintering resistance of the element of Cu:0.02～1.0% composition.
Modern with regard to hot rolled product, all be to utilize thickness cast or cast by cogging flat board for 130mm～300mm, in process furnace, heat, or backing is delivered to roughing and finishing mill, carry out hot rolling and make the lath of thickness 1.0～25.4mm, succeeded by up-coiler with the lath lopping tubular of reeling, through treated and make on various finishing lines again after the overcooling.
With regard to finishing mill, all be the continuous mill of taking four tunnel formula rolling mill 5-7 machines are configured as arranged in series usually.Though before generation clear and 30 years (nineteen fifty-five), be that to adopt 6 manufacturing works be many mostly, arrived clear and generation 40 years (nineteen sixty-five), in order to boost productivity and the maximization of matching ring tube, all manufacturing works nearly all change employing 7 desk-top machines and are listed as.In the precision work rolling process,, between the desktop computer row if when having two to be piled up, also be to be rolled in the same old way and to cause so-called contraction accident if because certain reason.Especially more its occurrence probability of back segment in operation is also high more, as if the finishing mill with 7 machine row, from the 5th desk-top later this accident of then easily seeing.If when suffering from this contraction accident, because it is rolling unusually, and frictional heating that causes and processing heating can locally be risen the roller surface temperature, when by water cooling, are subjected to pining for hitting, and produce crack performance sometimes at roller surface.Here it is so-called crawling.Usually if when being subjected to the contraction accident, then changing roll and check that the roll that meets with the contraction accident has or not crack performance,, just roll is carried out grinding until till the be full of cracks disappearance if confirm that be full of cracks is arranged.This means that roll unit's consumption resource worsens.Moreover, undiscovered if there is crawling, on and on re-use this roll, can be starting point then with its former crawling position, make be full of cracks continue to enlarge, even the danger that produces the spalling of rolls accident is arranged.So in this case, production line then must be shut down a few hours to tens of hours, thereby brings serious loss.
In the past, with regard to the roll that the processing back segment is used, except a part, generally all be to use the fiber crops mouthful close grain high alloy iron roll of rotary casting.Though the fiber crops mouthful close grain high alloy iron roll of rotary casting, the probability that crack performance takes place when suffering from the contraction accident is lower, moreover even its degree of depth is also more shallow when be full of cracks takes place, but its wear resistance is more inferior.Recently, gradually the roll that uses rapid steel system is also arranged as the trend of processing back segment with roll, though, its wear resistance is fine, than the about high 3-5 of fiber crops mouthful close grain high alloy iron roll of rotary casting doubly, if when suffering the contraction accident its to shrink incidence higher, and its be full of cracks degree of depth is also darker.
For example, with regard to the situation of the sheet plate that is used for car body, the vividness for will guarantee that automobile integral body is finished the time then requires to have sound product surface when hot rolling.Especially the sheet plate of using at electrified goods is as the same.
Moreover, because the frictional coefficient between the roll goods is bigger, and can't keep the good break-through of iron plate, sintering scab etc. therefore often takes place and damage its surface smoothness,, the technology that these problems systems all can utilize the spy to open flat 6-256888 number is solved.Yet, when rolling, because roller produces, perhaps because be rolled the iron scale of material, when product surface was scratched, perhaps its iron scale can inject goods as chock, when producing so-called acicular iron oxide skin scar, these relevant surface property problems even comprise that the spy opens flat 4-365836, the spy opens flat 6-256888, all fail to solve.
Moreover, open in flat 6-335712 number the spy, though having disclosed relevant is that carbide and cementite are formed the have metallographic hot rolling roller of wear-resisting sintering resistance of (metal structure) by graphite, MC, when carrying out rotary casting, because the centrifugal force centrifugation, MC is that carbide produces segregation, so the uniform properties of roll has the danger of decline, moreover, do not see that for acicular iron oxide skin cut appropriate countermeasure is arranged yet.
﹠amp; The purpose of #60 invention and the Shou Duan ﹠amp that deals with problems; #62
In view of above-mentioned variety of problems the objective of the invention is and will reach, except keeping rapid steel is the wear resistance of roll characteristic, and has both crack resistance and low-friction coefficient, even take the rotary casting operation, can not produce segregation yet, can guarantee surperficial anti-anchor simultaneously yet.
About first kind of cladding material for centrifugal casting roll of the present invention, it is made of following component: C:2.5～4.7%, Si:0.8～3.2%, Mn:0.1～2.0%, Cr:0.4～1.9%, Mo:0.6～5%, V:3.0～10.0%, Nb:0.6～7.0%, and need satisfy the relation of following formula (1), (2), (3) and (4)
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is Fe and unavoidable impurities, and its pouring temperature is more than 1400 ℃, has granular MC type carbide and graphite.
About second kind of cladding material for centrifugal casting roll of the present invention, it is made of following component: C:2.5～4.7%, Si:0.8～3.2%, Mn:0.1～2.0%, Cr:0.4～1.9%, Mo:0.6～5%, V:3.0～10.0%, Nb:0.6～7.0%, B:0.002～0.1%, and need satisfy the relation of following formula (1), (2), (3) and (4) formula
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is formed by Fe and inevitable impurity, and its teeming temperature is more than 1400 ℃, has granular MC type carbide and graphite.
The third is to be made of the Ni below the component and 5.5% of first and second kinds of cladding material for centrifugal casting roll respectively with the 4th kind of material for the present invention.
(A) about first kind of cladding material for centrifugal casting roll of the present invention
﹠amp; #60 must contain granular MC type Tan Huawu ﹠amp; #62
Existence with hard MC type carbide is the most effective for the wear resistance that improves roll.Especially it is granular making carbide morphology, by making it to be evenly distributed in the roll material tissue, can improve the uniformity and the crack resistance of roll.﹠amp; The #60 casting temp must be at 1400 ℃ of Yi Shang ﹠amp; #62
For improving the effective MC type carbide of wear resistance, known WC of having or VC are used usually.In this application, when rotary casting, in order to ensure granular MC type carbide, its feature is with Nb and the compound interpolation of V.That is, in molten metal, make with NbC be nucleus { V, the crystallization of Nb}C double carbide afterwards, are accompanied by the crystallization of eutectic structure graphite and solidify, and manufacturing work just finishes.Nb has an effect as the nucleus of the MC type carbon compound that generates crystallization in molten metal, moreover, because the proportion of VC carbide is less, so can be when rotary casting because of the centrifugation segregation, bigger { V, Nb}C double carbide are difficult for by the effect of centrifugation and have so can become proportion owing to added Nb.Yet if teeming temperature is low excessively, the crystallization carbide in molten metal ({ V, Nb}C) will be grown up, thickization, and in order to finish centrifugation, teeming temperature must be more than 1400 ℃.Preferably will be 1450～1520 ℃ scope.﹠amp; #60 must contain Shi Mo ﹠amp; #62
About the graphite crystallization amount, main system by its C as element, to graphite crystallization the Si of effect is arranged, the amount that consumes the VNb of C before graphite crystallization is main deciding, in the scope of the invention, area occupation ratio is 0.2～5%.This graphite is undertaken the effect that absorbs stress when thermal shocking.Moreover this graphite also has the effect of the solid lubricant of finishing, so that reduce frictional coefficient, improves anti-sintering adhesivity (anti-paying property of burning).
Composition C will be in 2.5～4.7% scope
The C element is the formation of hard carbide that improves the wear resistance of outer material of roll, and by make graphite in matrix, form crystallization the element of necessity, its content must be more than 2.5%, if surpass 4.7% words, will therefore reduce wear resistance, so be defined as 4.7% on it.Be good preferably 2.9～4.0%.
Composition Si will be in 0.8～3.2% scope
The Si element is to guarantee deoxidation and castibility, and for generating graphite crystallization adds, if content is below 0.8%, then for the crystallization deficiency of graphite, if surpass 3.2% words then the graphite crystallization amount become again and cause on the contrary that too much wear resistance descends, so be defined as 3.2% on it.
Composition Mn will be in 0.1～2.0% scope
Mn combines with the S that sneaks into as impurity and forms MnS, for prevent because of embrittlement that S causes, its content must be more than 0.1%, if surpass 2.0%, because can reduce crack resistance, so be defined as 2.0% on it, be good preferably 0.2～1.0%.
Composition Cr will be in 0.4～1.9% scope
The Cr element is in order to the formation carbide, and then improves its wear resistance, with reinforcement matrix and improvement crack resistance, so its content must on the other hand, be very strong whitening element more than 0.4%, if surpass 1.9%, in process of setting, contain the crystallization of overslaugh graphite.So be defined as 1.9% on it.Be good preferably 0.5～1.0%.
Composition Mo will be in 0.6～5% scope
Mo unit prime system is as the Cr element, improve wear resistance by forming carbide, and by strengthening matrix, can improve crack resistance effectively, simultaneously, for hardenability and the temper softening resistance that improves matrix effectively, so its content must be more than 0.6%, if when surpassing 5%, owing to can reduce crack resistance, so be defined as 5% on it.
Composition V will be in 3.0～10.0% scope
V element is to improve the most effective hard MC (or the M of wear resistance in order to form
4C
3) carbide (diameter is number μ m degree) must element, must be for bringing into play its effect at the content more than 3.0%, but descend on the contrary, reach the problem that manufacturings such as producing solubilizing poorly is gone up, so be defined as 10.0% on it as if its crack resistance of words that surpasses 10.0%.
Composition Nb will and satisfy 0.2≤Nb/V in: 0.6～7.0% scope ... (4)
Condition
The relative matrix molten metal of the proportion of VC carbide is much smaller, so as long as carry out rotary casting segregation will take place.And the purpose of adding Nb is to prevent this segregation.Nb system becomes double carbide (V, Nb) C with V-arrangement, and its proportion is then greater than the carbide of V separately.By this, so that prevent the segregation that causes because of centrifugation.So must change the addition of Nb according to the addition of V.When making with centre spinning method,, then must satisfy O.2≤condition of Nb/V for obtaining uniform cladding material based on Fig. 1.Moreover, owing to V system occupies more than 3.0%, so minimum Nb also will add more than 0.6%.On the other hand, Nb content is if surpass 7.0%, because can produce the problem in the manufacturing of solubilizing poorly etc., so be defined as 7.0% on it.
Moreover, at it " wearing and tearing are than (internal layer/skin) " shown in Fig. 1, be the ratio (Iw/Ow) of abrasion loss (Iw) with the abrasion loss (Ow) of the test film of taking from outer layer side of the test film that layer side taked within annular material.The test of Fig. 1; system adopts sample content composition to be: C:4.1%; Si:1.1%, Mn:0.3%, Cr:0.9%; Mo:2.0%; V:5.1%, Nb:0～7.5% is that 1470 ℃, the wall thickness of rotary casting (140G) gained are the annular sample of 100mm with teeming temperature; implement normalizing with regard to this sample with 1050 ℃ of temperature and handle, implement the sample that temper is crossed for 550 ℃ with temperature.Then, carry out wearing test, that is the disk of the test material of the contrast material of employing Ф 190 * 15 and φ 50 * 10 is in the skimming wear mode, to contrast material and be heated to 800 ℃, and apply and make of the rotating speed rotation of test material under the crimped status of loading 100kgf with 800rpm, sliding ratio is 3.9%, measures through the abrasion loss after 120 minutes.
Must satisfy 2.0+0.15V+0.10Nb≤C (%) ... (1) condition
The present invention's roll material is when solidifying, and { crystallization of V, Nb}C double carbide and dendrite afterwards, forms the crystallization of graphite, eutectic structure, solidifies operation and just finishes at first formation.C system preferentially is consumed by V, Nb, and remaining part is exactly things such as graphite.(1) formula is that graphite crystallization is set in area occupation ratio is condition more than 0.2%.
Must satisfy 1.1≤Mo/Cr ... (2) condition
This is for making the conditional of the unlikely generation needle-like of layer material scale defects outside the roll.By the experimental data of table 1, can understand that (2) formula is for the scope of needle-like oxide skin (scale) defective can not take place.It is C:4.0% that the rolling experiment system of table 1 takes composition, Si:1.3%, Mn:0.5%; Cr:0.6,1.0,1.7%; Mo:0.2～7.0%, V:4.8%, the molten metal of Nb:1.4%; teeming temperature is 1500 ℃; poured with molten metal is become sand mold, be processed into the cylinder piece of φ 90 * 250mm, and implement 1050 ℃ of normalizings and handle; and implement 550 ℃ of temper, be made for the roll of φ 70 * 140.Then, 3 of the bands of the thick 1.2mm width of clip SUS304 20mm length 600mm, and these three bands are implemented hot rolling with roll test.Its environment is a draft 40%, and roll speed is 100mpm, and rolling temperature is 1050 ℃, if be scaled machine performance in fact, then is equivalent to rolling 315 slabs at hot rolling processing leading portion (the 1st section).In this test, before being about to be rolled, just the band through being heated is carried out scale removal.After the test, observe being rolled the material condition of surface again, and check to have and do not scratch, not generation is not arranged on goods as the scale defects of insertion wedge-like.
Must satisfy Nb/V≤0.8 ... (3) condition
This is for guaranteeing the prerequisite formula of crack resistance.By experiment shown in Figure 2, can understand that (3) formula is for not damaging the scope of crack resistance.The coupons that the experiment system of Fig. 2 is taked by the outer layer side of the annular material of the experiment of Fig. 1.About thermal shock test, be plate tensile sample sheet, through letting alone to produce be full of cracks just in addition to implement water-cooled at once after crimping 15 seconds at the roll of 1200rpm rotation with 55 * 40 * 15mm.The crimping loading is 150kgf.After test, coupons is cut off and is measured be full of cracks length.
(B) about second kind of cladding material for centrifugal casting roll of the present invention
Described cladding material is by the component of first kind of cladding material for centrifugal casting roll of the present invention, and 0.002～0.1% B element (boron) constitutes.
The scope of B:0.002～0.1%
B element and the molten N of depositing element combine the nucleus that becomes BN and become graphite crystallization.Because the existence of the nucleus of this graphite makes the fine of kish change, improve wear resistance, simultaneously the time as rolling use, when roll weares and teares gradually, because it organizes size greatly in 10～100 μ m intended targets, can reach more even wearing and tearing, so can become more attractive in appearance through the surface skin layer of rolled product (plate).For reaching these effects, the content of B must be more than 0.002%, if surpass 0.1%, owing to causing the problem of crack resistance decline, so just the upper limit is set at 0.1%.Be good preferably 0.04～0.1%.
(C) about the present invention the third and the 4th kind of cladding material for centrifugal casting roll
They are made of the component and the 5.5% following Ni of first kind and second kind cladding material for centrifugal casting roll of the present invention respectively.This adds for improving hardenability.Little for roller diameter, or roll is thin again as if being made for socket type and thickness, can take water quenching, oil-quenched words again, just not necessarily will add the Ni element, if not this situation, had better be added to.With regard to roll, for will making the real core roll of maximum level diameter 1500mm, and, under the slow naturally cooling situation of speed of cooling, the work of can both quenching, the content of Ni then is set in below 5.5%.Be good preferably in 2.5～5.0% scope.
﹠amp; The Jian Danshuoming ﹠amp of #60 accompanying drawing; #62
Fig. 1 represents by the thermal wear ratio of the caused skin of the distribution of carbides in the annular material of rotary casting with interior interlayer, is subjected to the graphic representation of the content of Nb and V than the influence of Nb/V.
Fig. 2 is illustrated in when making thermal shock test, relates to the be full of cracks degree of depth, is subjected to the graphic representation of the content of Nb and V than the influence of Nb/V.
﹠amp; The Zui Jiafangan ﹠amp that #60 carries out an invention; #62
﹠amp; #60 embodiment 1﹠amp; #62
(material of the present invention is A1～A12 with the molten metal in the chemical constitution shown in the table 2; comparative material is B1～B13); adopting casting temp is 1480 ℃; utilize centrifugal casting (140G) to make the annular sample of thickness 100mm; again through 1030 ℃ normalizing handle, continue again after 530 ℃ of temper, carry out Shore hardness, defibrator process undermines thermal shock test.
Moreover, about wearing test, be the test film that layer side and outer layer side respectively taked φ 50 * 10 within annular material, carry out with above-mentioned condition and with same method.As for frictional coefficient, be to try to achieve it by test film radius and loading and the torque that acts on test film.
About thermal shock test, be to take as above-mentioned tabular test film, and carry out with identical condition from the outer layer side of annular material.
About rolling test is the test film of taking φ 70 * 40 from the outer layer side of annular material, and carries out with identical method with above-mentioned condition.
Now the result with these wearing tests, thermal shock test and rolling test shows it in table 3.According to table 3, (A1～A12) compare with comparative material, material of the present invention has all satisfied wearability, crack resistance, low-friction coefficient to material of the present invention simultaneously, the material homogeneity when anti-surface irregularity and rotary casting etc.
B
1Material system is less because of the C addition, and does not have the crystalline polamer of graphite, and its frictional coefficient is also big for this reason.B
2Material system causes the graphite crystallization amount too much because the C addition, and its wearability also reduces.B
3Material system is few because of the Si addition, so there is not graphite crystallization, its frictional coefficient is also high for this reason.As for B
4Material is many because of the Si addition, so the graphite crystallization quantitative change is too much, wearability descends.Moreover, because of not satisfying the condition of (2) formula, when rolling test, find defectiveness in the sheet surface.B
5Material system is many because of the Mn addition, so crack resistance but descends on the contrary.Moreover, again because do not satisfy the condition of (2) formula, when being rolled test, find defectiveness in the sheet surface.B
6Material system is because the Cr addition is few, so wearability also reduces.B
7Material system is because the Cr addition is too much, and whitening, so there is not graphite crystallization to occur.For this reason, its frictional coefficient is also big.B
8Material system is too much because of the Mo addition, and has reduced crack resistance.B
9Material system is because of V addition deficiency, so not only wearability descends, and crack resistance also reduces some.B
10Material system is because the V addition is too much, so crack resistance reduces.B
11Material system is because fail to satisfy the condition of (4) formula, because of the segregation of carbide takes place, so the wearability at outer position reduces.B
12Material system is because fail to satisfy the condition of (2) formula, so when doing rolling test, find defectiveness at product surface.B
13Material system is because fail to satisfy the condition of (3) formula, and crack resistance reduces.
﹠amp; #60 embodiment 2﹠amp; #62
Molten metal (material of the present invention: C with the chemical constitution shown in the table 4
1～C
12, comparative material: D
1～D
13), be that 1480 ℃ centrifugal casting (140G) casts with casting temp be the ring-type sample of thickness 100mm, implement again that 1030 ℃ of normalizings are handled and 530 ℃ of temper after, continue carry out Shore (SHORE) hardness test, defibrator process undermines thermal shock test.
Moreover, about wearing test, be that layer side and outer layer side respectively taked test piece φ 50 * 10mm within annular material, carry out with above-mentioned condition and with same method.Frictional coefficient system is tried to achieve by test film radius and loading and the torque that acts on test film.
Thermal shock test system takes as above-mentioned tabular test film from the outer layer side of ring-type material, and carries out with identical condition.
About the outer layer side of rolling test system, take the test film of φ 70 * 40mm, and test with identical method with above-mentioned condition from annular material.
Then, with the test-results of these wearing tests, thermal shock test and rolling test, in table 5 expression.According to table 5, can understand material (C of the present invention
1～C
12) compare the material homogeneity when material of the present invention can both satisfy wearability, crack resistance, low-friction coefficient, anti-surface irregularity and rotary casting simultaneously with comparative material.
D
1Material system is because the C addition is few, so there is not graphite crystallization to occur.For this reason, frictional coefficient is also big.D
2Material system is because the C addition is many, so the graphite crystallization amount is too much, and wearability reduces.D
3Material system is because the Si addition is few, so graphite crystallization do not occur, for this reason, frictional coefficient is big.D
4Material system is because the Si addition is many, so graphite crystallization quantitative change one-tenth too much, and wearability reduces.Moreover, because fail to satisfy the condition of (2) formula, so when doing rolling test, find defectiveness in the sheet surface.D
5Material is because the Mn addition is many, so crack resistance reduces.Moreover, because of not satisfying the condition of (2) formula, so when doing rolling test, find defectiveness in the sheet surface.D
6Material system is because the Cr addition is few, so wearability reduces.D
7Material system is too much because of the Cr addition, and causes whitening, graphite crystallization do not occur, and for this reason, it is big that its frictional coefficient becomes.D
8Material is because the Mo addition is too much, so crack resistance reduces.D
9Material system is because of V addition deficiency, and not only wearability reduces, and crack resistance has also reduced some.D
10Material system is because the V addition is too much, so crack resistance reduces.D
11Material is because fail to satisfy (4) condition, and causes the segregation phenomena of carbide, so the wearability of skin reduces.D
12Material system is not because satisfy the condition of (2) formula, so when doing rolling test, find defectiveness on the sheet surface.D
13Material system is not because satisfy the condition of (3) formula, so its crack resistance reduces.D
14Material system is not because add the B element, so its wearability is inferior than the A material.D
15Material system is because the B addition is too much, so crack resistance reduces.
﹠amp; #60 utilizes Ke Nengxing ﹠amp on industry; #62
With regard to above-mentioned the present invention, system can obtain: wearability, crack resistance, low-friction coefficient all possess, even adopt the rotary casting mode, not only can not cause segregation phenomena, also can obtain the rolling outer material of roll of using of anti-surface irregularity excellence simultaneously.
Table 1
| Cr Mo | Mo/Cr | Surface observation |
| Have not scratch not oxide skin phenomenon is arranged | ||
| 0.6 0.2 0.6 0.5 0.6 0.8 0.6 1.3 0.6 3.5 0.6 4.6 0.6 6.8 | 0.33 0.83 1.33 2.17 5.83 7.67 11.33 | Having or not does not have |
| 1.0 0.2 1.0 0.5 1.0 0.9 1.0 1.2 1.0 2.8 1.0 4.5 1.0 6.6 | 0.20 0.50 0.90 1.20 2.80 4.50 6.60 | Having or not does not have |
| 1.7 0.3 1.7 0.5 1.7 1.1 1.7 1.6 1.7 1.9 1.7 3.5 1.7 5.6 | 0.18 0.29 0.65 0.94 1.12 2.06 3.29 | Having or not does not have |
Table 2
| Distinguish | NO. | C | Si | Mn | P | S | Cr | Mo | V | Nb | Ni |
| Material of the present invention | A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 | 3.7 2.9 2.7 3.5 4.5 4.1 3.9 3.9 4.5 3.2 | 0.9 2.8 1.4 1.1 1.1 2.0 1.3 1.3 1.6 1.2 | 0.2 0.6 0.5 0.3 0.8 1.0 0.3 0.3 0.3 1.8 | 0.02 0.03 0.03 0.02 0.02 0.03 0.02 0.02 0.02 0.03 | 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 | 1.7 0.6 0.8 1.6 0.6 1.5 0.7 0.8 0.6 0.8 | 4.0 0.7 1.2 1.8 3.0 2.0 1.8 2.0 1.0 1.2 | 3.0 4.2 3.4 7.0 5.0 4.8 5.0 3.8 3.2 5.2 | 1.0 2.0 1.2 3.1 2.1 1.6 1.3 2.9 0.9 4.0 | - - - - - - - - - - |
| M1 M2 | 2.8 3.2 | 1.2 1.5 | 0.4 0.3 | 0.03 0.03 | 0.01 0.01 | 0.9 0.8 | 2.5 2.1 | 3.7 4.6 | 1.3 2.0 | 1.5 4.8 | |
| Comparative material | B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 | 2.4 4.8 3.9 3.2 4.0 3.9 3.8 4.2 3.9 4.3 3.6 3.7 3.8 | 1.2 1.0 0.4 3.5 1.1 1.0 1.6 1.0 0.9 1.3 1.1 1.2 1.5 | 0.2 0.3 0.3 0.4 2.3 0.4 0.3 0.3 0.5 0.4 0.3 0.3 0.8 | 0.02 0.03 0.03 0.03 0.03 0.02 0.02 0.03 0.03 0.02 0.03 0.03 0.03 | 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 | 1.7 0.7 0.8 1.7 0.8 0.1 2.1 1.5 0.6 0.7 0.8 1.6 0.7 | 1.9 2.1 2.5 0.8 0.7 1.8 2.5 6.1 1.5 1.3 0.9 1.2 1.6 | 5.1 3.8 6.0 5.0 4.6 5.2 5.1 4.2 2.6 10.7 3.4 5.1 5.5 | 1.8 2.7 1.3 1.5 2.1 1.2 3.0 1.2 1.2 3.0 0.6 1.6 5.0 | - - - - - - - - - - - - - |
Table 3
| No. | 2.0+0.15V+ 0.10Nb-C (％) | Mo/Cr | Nb/V | Hardness lls | Graphite area occupation ratio (%) | Wearing test | Rolling test | Thermal shock test | |||
| Surface observation | Thermal shocking be full of cracks full depth (mm) | ||||||||||
| Abrasion loss (g) | Frictional coefficient (-) | ||||||||||
| Do not have and scratch | Not oxide skin phenomenon is arranged | ||||||||||
| Outer | Internal layer | ||||||||||
| A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 | -1.15 -0.07 -0.07 -0.14 -1.54 -1.22 -1.02 -1.04 -1.93 -0.02 | 2.35 1.17 1.50 1.13 5.00 1.33 2.57 2.50 1.67 1.50 | 0.33 0.40 0.35 0.44 0.42 0.33 0.26 0.76 0.28 0.77 | 80 81 79 81 82 80 79 80 81 80 | 1.7 0.7 0.4 0.3 2.6 2.1 1.8 1.8 3.2 0.3 | 0.17 0.18 0.18 0.20 0.16 0.18 0.18 0.19 0.16 0.17 | 0.18 0.10 0.19 0.19 0.17 0.19 0.17 0.17 0.15 0.15 | 0.264 0.272 0.271 0.268 0.269 0.270 0.267 0.266 0.271 0.268 | Do not have | Do not have | 0.2 0.3 0.4 0.2 0.1 0.3 0.1 0.1 0.2 0.1 |
| A11 A12 | -0.12 -0.31 | 2.78 2.63 | 0.35 0.43 | 80 82 | 0.4 0.7 | 0.17 0.17 | 0.16 0.15 | 0.270 0.268 | Do not have | Do not have | 0.1 0.2 |
| B1 B2 B3 B4 | 0.55 -1.96 | 1.12 3.00 | 0.35 0.71 | 81 82 | 0.0 5.6 | 0.17 1.23 | 0.16 1.45 | 0.380 0.270 | Do not have | Do not have | 0.2 0.5 |
| -0.87 -0.30 | 3.13 0.47 | 0.22 0.30 | 80 80 | 0.0 8.0 | 0.17 1.66 | 0.18 1.50 | 0.365 0.268 | Nothing has | Do not have | 0.3 0.4 | |
| B5 | -1.10 | 0.80 | 0.46 | 81 | 1.9 | 0.10 | 0.19 | 0.273 | Have | Have | 2.8 |
| B6 B7 B8 B9 B10 B11 B12 B13 | -1.00 -0.74 -1.45 -1.39 -0.40 -1.03 -0.78 -0.48 | 18.00 1.19 4.07 2.50 1.86 1.13 0.75 2.29 | 0.23 0.59 0.29 0.46 0.28 0.18 0.31 0.91 | 80 83 80 79 80 81 81 80 | 1.8 0.0 2.2 2.3 0.9 1.7 1.2 1.0 | 0.89 0.18 0.18 1.03 0.17 1.50 0.18 0.19 | 0.90 0.20 0.18 1.11 0.16 0.13 0.18 0.17 | 0.268 0.399 0.273 0.268 0.273 0.273 0.269 0.275 | Do not have and have or not | Do not have and have or not | 3.2 0.6 3.3 0.7 1.9 0.3 0.2 2.3 |
Table 4
| No | C | Si | Mn | P | S | Cr | Mo | V | Nb | B | Ni |
| C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 | 3.6 3.0 2.6 3.5 4.4 4.1 3.8 3.9 4.6 3.2 | 0.8 2.9 1.3 0.9 1.3 2.2 1.3 1.5 1.6 1.2 | 0.3 0.7 0.4 0.2 0.9 0.9 0.4 0.3 0.2 1.9 | 0.02 0.02 0.03 0.02 0.03 0.03 0.02 0.02 0.02 0.03 | 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 | 1.7 0.6 0.7 1.5 0.8 1.4 0.7 0.9 0.5 0.6 | 3.8 0.8 1.4 1.9 3.1 1.8 1.9 1.8 1.0 1.2 | 3.1 4.1 3.3 7.2 4.8 5.0 5.1 3.8 3.0 5.0 | 0.7 2.1 0.9 3.2 2.1 1.5 1.2 2.9 1.1 3.9 | 0.003 0.009 0.021 0.080 0.050 0.092 0.008 0.031 0.015 0.077 | - - - - - - - - - - |
| C11 C12 | 2.9 3.2 | 1.2 1.6 | 0.4 0.3 | 0.03 0.03 | 0.01 0.01 | 0.8 1.1 | 2.5 2.2 | 3.6 4.8 | 1.5 2.0 | 0.011 0.056 | 1.3 4.6 |
| D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 | 2.4 4.9 4.0 3.3 3.9 4.1 3.9 4.1 3.9 4.4 3.7 3.6 3.9 4.0 3.8 | 1.1 0.9 0.3 3.4 0.9 1.0 1.5 0.9 0.9 1.2 1.1 0.9 1.6 0.9 2.2 | 0.3 0.3 0.3 0.5 2.3 0.4 0.3 0.3 0.5 0.3 0.4 0.5 0.7 0.3 0.4 | 0.02 0.03 0.03 0.02 0.03 0.02 0.02 0.03 0.02 0.02 0.02 0.03 0.03 0.02 0.03 | 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 | 1.6 0.8 0.9 1.5 0.8 0.2 2.2 1.4 0.7 0.8 0.8 1.6 0.8 0.8 1.1 | 1.8 1.9 2.5 0.9 1.1 1.8 2.6 5.5 1.4 1 3 1.0 1.1 1.6 1.9 3.2 | 5.0 3.5 5.5 5.0 4.5 6.0 4.9 4.2 2.4 10.6 3.5 5.1 4.6 3.2 6.2 | 1.9 2.3 1.2 1.6 2.1 3.1 2.2 1.2 1.2 2.8 0.5 1.6 5.0 1.2 2.5 | 0.005 0.023 0.048 0.089 0.013 0.032 0.055 0.007 0.009 0.062 0.025 0.006 0.014 0.120 | - - - - - - - - - - - - - - - |
Table 5
| No. | 2.0/0.15V+ 0.10Nb-C (％) | Mo/Cr | Nb/V | Hardness lls | Graphite area occupation ratio (%) | Wearing test | Rolling test | Thermal shock test | |||
| Surface observation | Thermal shocking be full of cracks full depth (mm) | ||||||||||
| Abrasion loss (g) | Frictional coefficient (-) | ||||||||||
| Do not have and scratch | Not oxide skin phenomenon is arranged | ||||||||||
| Outer | Internal layer | ||||||||||
| C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 | -1.07 -0.18 -0.02 -0.11 -1.47 -1.19 -0.92 -1.04 -2.04 -0.05 | 2.24 1.33 1.99 1.25 3.99 1.27 2.66 2.11 2.15 2.02 | 0.23 0.53 0.27 0.44 0.44 0.31 0.23 0.75 0.35 0.77 | 80 80 81 82 80 79 80 81 79 82 | 1.6 0.9 0.3 0.2 2.4 2.1 1.6 1.8 3.4 0.3 | 0.13 0.14 0.14 0.14 0.12 0.14 0.14 0.15 0.12 0.13 | 0.14 0.12 0.15 0.15 0.13 0.15 0.13 0.13 0.11 0.11 | 0.261 0.271 0.271 0.270 0.267 0.274 0.265 0.262 0.269 0.264 | Do not have | Do not have | 0.1 0.3 0.2 0.2 0.1 0.4 0.2 0.1 0.2 0.2 |
| C11 C12 | -0.21 -0.28 | 3.13 2.00 | 0.43 0.41 | 81 82 | 0.5 0.7 | 0.13 0.13 | 0.12 0.11 | 0.272 0.269 | Do not have | Do not have | 0.2 0.1 |
| D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 | 0.54 -2.15 -1.06 -0.39 -1.02 -0.89 -0.95 -1.35 -1.42 -0.53 -1.13 -0.68 -0.71 -1.40 -0.62 | 1.13 2.38 2.70 0.60 1.30 9.00 1.18 3.93 2.00 1.63 1.25 0.69 2.00 2.38 2.91 | 0.38 0.66 0.22 0.32 0.47 0.52 0.45 0.29 0.50 0.26 0.14 0.31 1.09 0.38 0.40 | 82 80 81 80 81 80 82 81 80 79 81 81 81 82 82 | 0.0 5.6 0.0 8.0 1.7 1.6 0.0 2.1 2.3 1.0 1.9 1.0 1.4 2.3 1.3 | 0.13 0.78 0.13 1.44 0.14 0.88 0.14 0.14 0.99 0.13 1.23 0.14 0.15 0.20 0.21 | 0.12 0.65 0.14 1.42 0.16 0.85 0.16 0.14 1.07 0.12 0.12 0.14 0.13 0.21 0.20 | 0.383 0.272 0.369 0.270 0.271 0.267 0.402 0.271 0.267 0.277 0.272 0.269 0.276 0.202 0.273 | Not having to have or not have to have or not does not have | Not having to have or not have to have or not does not have | 0.2 0.4 0.3 0.3 2.9 3.3 0.5 3.4 1.0 2.0 0.2 0.3 2.6 0.3 2.8 |
Claims (4)
1. a cladding material for centrifugal casting roll is characterized in that, it is made of following component:
C：2.5～4.7％，Si：0.8～3.2％，Mn：0.1～2.0％，Cr：0.4～1.9％，Mo：0.6～5％，V：3.0～10.0％，Nb：0.6～7.0％，
And each component need satisfy the relation of following formula (1), (2), (3) and (4)
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is Fe and unavoidable impurities,
Its pouring temperature is set in more than 1400 ℃, has granular MC type carbide and graphite.
2. a cladding material for centrifugal casting roll is characterized in that, it is made of following component:
C：2.5～4.7％，Si：0.8～3.2％，Mn：0.1～2.0％，Cr：0.4～1.9％，Mo：0.6～5％，V：3.0～10.0％，Nb：0.6～7.0％，B：0.002～0.1％，
And need satisfy the relation of following formula (1), (2), (3) and (4) formula,
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is Fe and unavoidable impurities,
Its pouring temperature is set in more than 1400 ℃, has granular MC type carbide and graphite.
3. a cladding material for centrifugal casting roll is characterized in that, it is made of following component:
C:2.5～4.7%, Si:0.8～3.2%, Mn:0.1～2.0%, Cr:0.4～1.9%, Mo:0.6～5%, V:3.0～10.0%, Nb:0.6～7.0%, below the Ni:5.5%,
And each component need satisfy the relation of following formula (1), (2), (3) and (4):
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is Fe and unavoidable impurities,
Its pouring temperature is set in more than 1400 ℃, has granular MC type carbide and graphite.
4. a cladding material for centrifugal casting roll is characterized in that, it is made of following component:
C:2.5～4.7%, Si:0.8～3.2%, Mn:0.1～2.0%, Cr:0.4～1.9%, Mo:0.6～5%, V:3.0～10.0%, Nb:0.6～7.0%, B:0.002-0.1%, below the Ni:5.5%,
And need satisfy the relation of following formula (1), (2), (3) and (4),
2.0+0.15V+0.10Nb≤C(％) ……(1)
1.1≤Mo/Cr ……(2)
Nb/V≤0.8 ……(3)
0.2≤Nb/V ……(4)
Surplus is Fe and unavoidable impurities,
Its pouring temperature is set in more than 1400 ℃, has granular MC type carbide and graphite.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP72513/1995 | 1995-03-07 | ||
| JP7251395 | 1995-03-07 | ||
| JP72513/95 | 1995-03-07 | ||
| JP8042162A JP2852018B2 (en) | 1995-03-07 | 1996-02-06 | Outer layer material for centrifugal casting rolls |
| JP42162/96 | 1996-02-06 | ||
| JP42162/1996 | 1996-02-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1153539A CN1153539A (en) | 1997-07-02 |
| CN1062610C true CN1062610C (en) | 2001-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96190447A Expired - Fee Related CN1062610C (en) | 1995-03-07 | 1996-03-06 | Cladding material for centrifugal casting roll |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5738734A (en) |
| EP (1) | EP0760398A4 (en) |
| JP (1) | JP2852018B2 (en) |
| KR (1) | KR100234591B1 (en) |
| CN (1) | CN1062610C (en) |
| BR (1) | BR9605883A (en) |
| CA (1) | CA2189668C (en) |
| WO (1) | WO1996027688A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU704855B2 (en) † | 1995-06-06 | 1999-05-06 | Akers Ab | Cast iron indefinite chill roll produced by the addition of niobium |
| AT408666B (en) * | 1999-04-22 | 2002-02-25 | Weinberger Eisenwerk | CASTING MATERIAL AND METHOD FOR THE PRODUCTION THEREOF |
| SE514226C2 (en) * | 1999-04-30 | 2001-01-22 | Uddeholm Tooling Ab | Cold working tools of steel, its use and manufacture |
| US8156651B2 (en) | 2004-09-13 | 2012-04-17 | Hitachi Metals, Ltd. | Centrifugally cast external layer for rolling roll and method for manufacture thereof |
| EP1975265B1 (en) * | 2005-12-28 | 2019-05-08 | Hitachi Metals, Ltd. | Centrifugally cast composite roll |
| US8333923B2 (en) * | 2007-02-28 | 2012-12-18 | Caterpillar Inc. | High strength gray cast iron |
| US9757779B2 (en) | 2011-09-21 | 2017-09-12 | Hitachi Metals, Ltd. | Centrifugally cast composite roll for hot rolling and its production method |
| MX357864B (en) | 2011-11-21 | 2018-07-25 | Hitachi Metals Ltd | Centrifugally cast composite rolling mill roll and manufacturing method therefor. |
| CN106065451B (en) * | 2016-07-06 | 2018-09-21 | 昆明理工大学 | It is a kind of to improve (Cr, Fe) simultaneously7C3The method of hardness and toughness |
| CN111151732A (en) * | 2019-12-31 | 2020-05-15 | 江苏共昌轧辊股份有限公司 | Preparation method of high-speed steel roller for finish rolling rear section of endless strip steel |
| KR20240047650A (en) | 2022-10-05 | 2024-04-12 | 김영락 | Prefabricated potted wreath |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266041A (en) * | 1987-04-23 | 1988-11-02 | Nkk Corp | Roll for hot rolling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5124969B2 (en) * | 1971-12-22 | 1976-07-28 | ||
| JPS59178110A (en) * | 1984-03-03 | 1984-10-09 | Kubota Ltd | Composite sleeve roll for h-beam rolling and its manufacture |
| JPH0692626B2 (en) * | 1989-07-20 | 1994-11-16 | 住友金属工業株式会社 | Forging roll for hot rolling |
| US5225007A (en) * | 1990-02-28 | 1993-07-06 | Hitachi Metals Ltd. | Method for wear-resistant compound roll manufacture |
| JP2715199B2 (en) * | 1990-10-01 | 1998-02-18 | 川崎製鉄株式会社 | Roll outer layer material for rolling |
| EP0562114B1 (en) * | 1991-09-12 | 1998-11-04 | Kawasaki Steel Corporation | Material of outer layer of roll for rolling and compound roll manufactured by centrifugal casting |
| JP2601746B2 (en) * | 1992-04-30 | 1997-04-16 | 川崎製鉄株式会社 | Centrifugal casting sleeve roll and its manufacturing method |
| JP2835259B2 (en) * | 1993-03-05 | 1998-12-14 | 株式会社クボタ | High-speed cast iron with graphite and composite roll |
| JP3307501B2 (en) * | 1993-03-31 | 2002-07-24 | 日立金属株式会社 | Abrasion resistant seizure resistant hot roll |
-
1996
- 1996-02-06 JP JP8042162A patent/JP2852018B2/en not_active Expired - Fee Related
- 1996-03-06 KR KR1019960706246A patent/KR100234591B1/en not_active IP Right Cessation
- 1996-03-06 EP EP96905011A patent/EP0760398A4/en not_active Ceased
- 1996-03-06 CN CN96190447A patent/CN1062610C/en not_active Expired - Fee Related
- 1996-03-06 US US08/737,070 patent/US5738734A/en not_active Expired - Fee Related
- 1996-03-06 BR BR9605883A patent/BR9605883A/en not_active IP Right Cessation
- 1996-03-06 CA CA002189668A patent/CA2189668C/en not_active Expired - Fee Related
- 1996-03-06 WO PCT/JP1996/000544 patent/WO1996027688A1/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63266041A (en) * | 1987-04-23 | 1988-11-02 | Nkk Corp | Roll for hot rolling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08302444A (en) | 1996-11-19 |
| CN1153539A (en) | 1997-07-02 |
| WO1996027688A1 (en) | 1996-09-12 |
| CA2189668C (en) | 2001-01-30 |
| CA2189668A1 (en) | 1996-09-12 |
| EP0760398A4 (en) | 1998-07-15 |
| US5738734A (en) | 1998-04-14 |
| BR9605883A (en) | 1997-09-16 |
| KR970702936A (en) | 1997-06-10 |
| JP2852018B2 (en) | 1999-01-27 |
| EP0760398A1 (en) | 1997-03-05 |
| KR100234591B1 (en) | 1999-12-15 |
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